I am using the Mirage Swift nasal pillows; 'started treatment a couple weeks ago. While I am doing fairly well, the last few nights I have woken up in the middle of the night and it seems as if there is A LOT more air coming out of the exhaust area and also that the sound of the air coming out is louder. My humidifier is set at 2; I've changed my filter, checked my hoses...I am wondering if it is just my perception; waking up in the wee hours and everything being so quiet, and the exhalation sound seeming so much louder. It seemed like maybe something was leaking, but I am not sure. While I am going to contact my respiratory therapist about this, I was curious to hear if anyone has had a similar experience and/or advice....